In a large skillet, heat oil over medium high heat and cook ground turkey and onion until browned. Add garlic and cook for one minute.

Stir in tomatoes, tomato sauce, water, and lasagna pieces. Cover and bring to a boil. Reduce to a simmer and stir occasionally to evenly distribute the noodles as they soften, about 15 minutes. Add more water if the sauce becomes too dry. Season with salt and pepper to taste.

Drop ricotta by heaping spoonfuls onto the top of the lasagna, then cover and let it warm through.

Top with shredded mozzarella and place under broiler until cheese is melted and bubbly. Serve with basil and Parmesan if desired.